Breathable roofing membrane silly question

silly question but which way up should my breathable felt go?
the label says coloured side up, it has a black slightly shinier side and a white holey side. it makes sense to me that the shinier side is more water resistant, whereas the porous looking side lets the moisture through.
i was expecting a this side up mark or something.
silly question but not as silly as wasting it and having to relay it all.
its a daltex roofTX if thats makes any difference.

Writing side on the outside.

well thats it, theres no writing.

any other info? there is no markings whatsoever.

Coloured side up. If it's on a roll you can't really get it wrong, it goes one way.